PopularFX
Home Help Search Login Register
Welcome,Guest. Please login or register.
2019-12-11, 08:34:24
News: A feature is available which provides a place all members can chat, either publicly or privately.
There is also a "Shout" feature on each page. Only available to members.

Pages: 1 2 3 [4]
Author Topic: Dose it take power to create a magnetic field  (Read 1821 times)

Group: Administrator
Hero Member
*****

Posts: 2906
It's not as complicated as it may seem...
Not with an air coil. It might change the inductance of a cored coil if the flux density moves part of the core above the BH knee.
During the slug attraction event, isn't the coil transitioning from an air core to a ferrite-cored coil?

Quote
I would expect an opposing emf as the keeper approaches and aiding emf when it departs.
Is this experiment not sufficiently representative of the "slug-sc coil" thought experiment? If there is an emf generated by the slug attraction event, why would it not cause a dissipation of power in the coil's finite resistance?
   

Group: Professor
Hero Member
*****

Posts: 1479
During the slug attraction event, isn't the coil transitioning from an air core to a ferrite-cored coil?
Indeed it is

Is this experiment not sufficiently representative of the "slug-sc coil" thought experiment? If there is an emf generated by the slug attraction event, why would it not cause a dissipation of power in the coil's finite resistance?
Because there is no time to dissipate the energy of the external flux disturbance in a coil in which the time constant is between 28 and 100000 years and resistance is so minuscule ...and in the case of "vortex glass" truly zero.
In a resistive coil, there is ample time.

BTW: I agree that the emf generated by the slug attraction event will diminish the current flowing through the coil.
   
Pages: 1 2 3 [4]
« previous next »


 

Home Help Search Login Register
Theme © PopularFX | Based on PFX Ideas! | Scripts from iScript4u 2019-12-11, 08:34:24